EP4261194A1 - Procédé de combustion lente - Google Patents

Procédé de combustion lente Download PDF

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Publication number
EP4261194A1
EP4261194A1 EP22305554.2A EP22305554A EP4261194A1 EP 4261194 A1 EP4261194 A1 EP 4261194A1 EP 22305554 A EP22305554 A EP 22305554A EP 4261194 A1 EP4261194 A1 EP 4261194A1
Authority
EP
European Patent Office
Prior art keywords
mineral wool
weight
preferentially
smouldering
mixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22305554.2A
Other languages
German (de)
English (en)
Inventor
Mona Ammitzboell RASMUSSEN
Erling Jessen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Isover SA France
Original Assignee
Saint Gobain Isover SA France
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saint Gobain Isover SA France filed Critical Saint Gobain Isover SA France
Priority to EP22305554.2A priority Critical patent/EP4261194A1/fr
Publication of EP4261194A1 publication Critical patent/EP4261194A1/fr
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B1/00—Preparing the batches
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B3/00—Charging the melting furnaces
    • C03B3/02—Charging the melting furnaces combined with preheating, premelting or pretreating the glass-making ingredients, pellets or cullet
    • C03B3/023—Preheating
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • C03C1/002—Use of waste materials, e.g. slags
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • C03C1/02—Pretreated ingredients
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation

Definitions

  • the present invention relates to a method for processing a mineral wool mixture, a smouldering furnace adapted for implementing this method, and the resulting processed mineral wool.
  • the invention also relates to a raw material composition including such processed mineral wool, its implementation in a glass melting furnace, and the subsequent manufacturing of mineral wool fibers.
  • such a mineral wool mixture comprises one or more types of non-combustible mineral fibers originating from the production of said fibers (factory waste), from building sites (construction site waste or demolition site waste) and/or from recycling channels allowing the recovery of such fibers from end products, whether or not they have been used.
  • factor waste the various stages of mineral wool production generate a certain amount of waste that enters the composition of said mineral wool mixture.
  • This waste may come from the cutting of products (and/or discarded products), for example, and it contains sufficient quantities of organic materials such as resins called "binders" and intended to ensure the mechanical cohesion of the fibrous mats.
  • the mineral wool insulation products derived from processing the fibrous mat are all certified as non combustible products, as the organic content is below the prescribed limits of reaction to fire by testing calorimetric values, non-flaming when heated and exposed to a flames, all as listed in the e.g. EN13501-1 'Fire classification of construction products and building elements'.
  • Other types of materials can be combined with mineral fiber products, e.g. paper, aluminum or fibrous mats, for further enhancement of product uses.
  • the mineral wool products become waste, it can furthermore be contaminated or purposefully added with bituminous films, wastes from wind mills or wooden pallet parts.
  • Such mineral fibers may in particular consist of glass and/or rock. They are then known as glasswool and stonewool, respectively.
  • the invention relates to a method for processing a mineral wool mixture containing organic material by smouldering combustion, characterized in that it comprises a first step of initiating the combustion of the mineral wool mixture by supplying energy, and a subsequent step of maintaining the smouldering combustion in a self-sustaining regime.
  • the mineral wool mixture to be processed is certified as being non-combustible. This teaching could not be ignored or contested, and would have naturally lead the skilled person away from any technical solution involving a combustion. against all odds, the inventors have however overcome this technical prejudice by taking advantage of the own organic content of the mineral wool mixture, and the benefits of the smouldering combustion, to remove or at least reduce significantly its organic content while limiting the overall energy consumption.
  • maintaining the smouldering combustion in a self-sustaining regime comprises a step of compressing the mineral wool mixture, preferentially by a screw or stamping compression, to a volumic mass between 50 and 1000 kg/m3, preferentially between 150 and 600 kg/m3.
  • the step of compressing is implemented continuously.
  • maintaining the smouldering combustion in a self-sustaining regime comprises a step of supplying the mineral wool mixture in oxygen.
  • said oxygen is supplied, preferentially in a mixture of oxygen with air, by a chimney, a ventilator and/or a dedicated reactor.
  • glowing front refers to the thermally most active area of the mineral wool mixture.
  • a special advantage of smouldering combustion in a relatively low oxygen combustion is that carbon residue from binders are preserved in the material and if the material afterwards is used as a geopolymer (with no heating or further combusting of the carbon), this will sequester the carbon residue from binders.
  • the sequestered carbon residue can act as a grey colouring of the geopolymer.
  • the excess heat from smouldering combustion is recovered, preferentially for supplying a heat pump and or a heater.
  • the ground mineral wool mixture comprises, excluding the binder:
  • the ground mineral wool mixture consists of a stonewool (also called “black glass” by the person skilled in the art) which comprises, excluding the binder:
  • the ground mineral wool mixture consists of a aluminosilicates which comprises, excluding the binder:
  • the mineral wool mixture to be processed comprises metallic foil, especially aluminium foil.
  • the invention also relates to a smouldering furnace adapted for implementing such a method for processing a mineral wool mixture, characterized in that it comprises at least one smouldering combustion chamber adapted to receive the mineral wool mixture to be processed, and at least of initiator, preferentially a heater, to initiate the smouldering combustion, without any additional source of energy.
  • the initiator is removable.
  • geopolymers refer to inorganic, typically ceramic, alumino-silicate forming long-range, covalently bonded, non-crystalline (amorphous) networks. These geopolymers form a hard material that can replace environmentally problematic cementitious materials.
  • the forming of geopolymers with the processed mineral wool as a feedstock also allows to sequester the carbon residue from binders left in the processed mineral wool by including the carbon residue in the amorphous network of the geopolymers, therefore reducing the environmental footprint of the overall process.
  • such a composition of raw materials can be melted in a glass furnace with submerged and / or emerged burners, in an electric furnace, and / or in a hybrid furnace using both at least one burner and electrodes. After leaving the furnace, the molten composition can either be immediately fiberized, or be first transformed into cullet and later (subsequently) melted again and fiberized in order to obtain a mineral wool product.
  • the invention also relates to a method for manufacturing mineral fibers, characterized in that it comprises the implementation of such a melting method, and a subsequent step of fiberizing the molten composition.
  • the invention also relates to a non-transitory computer-readable medium comprising a computer program product recorded thereon and capable of being run by a processor, including program code instructions for implementing such a method for processing a mineral wool mixture.
  • Figure 1 illustrates a smouldering furnace 1 according to one embodiment of the invention, which comprises a smouldering combustion chamber 2 defined by a roof on the top, side walls, and a floor, and adapted to receive a mineral wool mixture 3 to be processed according to a method illustrated in Figure 2 .
  • the mineral wool mixture 3 is introduced within the smouldering combustion chamber 2 through its side walls, by dedicated feeders (not illustrated).
  • the mineral wool mixture 3 is then compressed by a press 4, while being supplied in oxygen by a dedicated circuit 5, through the floor of the chamber.
  • step S1 The smouldering combustion is then initiated (step S1) by a heater 6 located under the floor, which brings the lower portion of the mineral wool mixture, that is to say its "glowing front" 7, to a temperature of 400-800°Celcius during e.g. 15-90 minutes.
  • step S1 the heater 6 is stopped, so that the smouldering combustion transitions to a self-sustaining regime (step S2) in which, by definition, no any additional energy is supplied.
  • the mineral wool mixture 3 introduced within the smouldering combustion chamber consists in glass wool which comprises, excluding the binder:
  • the mineral wool mixture 3 introduced within the smouldering combustion chamber consists in stonewool which comprises, excluding the binder:
  • step S2 which is to say at the end of the smouldering combustion processing, the silicate from the glass wool waste and the aluminium from the foil will be very much fit to make a geopolymer.
  • the processed mineral wool mixture 9 can either be used as such in various industrial applications known by the skilled person, or be incorporated - alone or with other components - into a raw material composition 10 that is fed into a glass melting installation.
  • the raw material composition 10 is then melted (step S3) either to produce cullets or, as illustrated by Figure 2 , to be transformed by a fiberizing machine (step S4) into new glass fibers 11.
  • Figure 3 is a schematic block diagram illustrating an example of an apparatus for implementing a method for processing a mineral wool mixture by smouldering combustion, according to one particular embodiment of the invention.
  • An apparatus 8 illustrated in Figure 3 includes a processor 12, a storage unit 13, an interface unit 14 and several sensors 15, which are connected by a bus 16. Of course, constituent elements of the computer apparatus 8 may be connected by a connection other than a bus connection using the bus 16.
  • the processor 12 controls operations of the apparatus 8.
  • the storage unit 13 stores at least one program to be executed by the processor 12, and various data, including values of oxygen content and pressure to be implemented in the glowing front, parameters used by computations performed by the processor 12, intermediate data of computations performed by the processor 12, and so on.
  • the storage unit 13 may notably store the values of temperature, pressure and oxygen content measured and provided by the dedicated sensors 15.
  • the processor 12 may be formed by any known and suitable hardware, or software, or by a combination of hardware and software.
  • the processor 12 may be formed by dedicated hardware such as a processing circuit, or by a programmable processing unit such as a CPU (Central Processing Unit) that executes a program stored in a memory thereof.
  • the storage unit 13 may be formed by any suitable storage or means capable of storing the program, data, or the like in a computer-readable manner. Examples of the storage unit 13 include non-transitory computer-readable storage media such as semiconductor memory devices, and magnetic, optical, or magneto-optical recording media loaded into a read and write unit.
  • the program causes the processor 12 to perform and control the processing of the mineral wool mixture by smouldering combustion as described above with reference to Figure 2 .
  • aspects of the present principles can be embodied as a system, method or computer readable medium. Accordingly, aspects of the present principles can take the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, micro-code, and so forth), or an embodiment combining software and hardware aspects.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Glass Compositions (AREA)
EP22305554.2A 2022-04-14 2022-04-14 Procédé de combustion lente Pending EP4261194A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22305554.2A EP4261194A1 (fr) 2022-04-14 2022-04-14 Procédé de combustion lente

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22305554.2A EP4261194A1 (fr) 2022-04-14 2022-04-14 Procédé de combustion lente

Publications (1)

Publication Number Publication Date
EP4261194A1 true EP4261194A1 (fr) 2023-10-18

Family

ID=81579704

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22305554.2A Pending EP4261194A1 (fr) 2022-04-14 2022-04-14 Procédé de combustion lente

Country Status (1)

Country Link
EP (1) EP4261194A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5063860A (en) * 1989-02-23 1991-11-12 Isover Saint-Gobain Method and apparatus for melting materials containing inorganic material fibers by the supply of oxygen rich gas
US5186112A (en) * 1989-02-23 1993-02-16 Isover Saint-Gobain Method and apparatus for melting materials containing inorganic material fibers by the supply of oxygen rich gas
US20080256981A1 (en) * 2004-07-29 2008-10-23 Saint-Gobain Isover Method and Device for Treating Fibrous Wastes for Recycling
EP2072474A1 (fr) * 2007-12-19 2009-06-24 E. Schwenk Dämmtechnik GmbH & Co. KG Procédé et dispositif destinés au recyclage de déchets de laine minérale contenant des composants organiques
US20130291591A1 (en) * 2012-05-04 2013-11-07 Sasil S.P.A. Method and equipment for recovering waste from continuous fibre production installations and for directly recycling the resulting glass

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5063860A (en) * 1989-02-23 1991-11-12 Isover Saint-Gobain Method and apparatus for melting materials containing inorganic material fibers by the supply of oxygen rich gas
US5186112A (en) * 1989-02-23 1993-02-16 Isover Saint-Gobain Method and apparatus for melting materials containing inorganic material fibers by the supply of oxygen rich gas
US20080256981A1 (en) * 2004-07-29 2008-10-23 Saint-Gobain Isover Method and Device for Treating Fibrous Wastes for Recycling
EP1771391B1 (fr) 2004-07-29 2012-02-29 Saint-Gobain Isover Procede et dispositif de traitement de dechets fibreux en vue de leur recyclage
EP2072474A1 (fr) * 2007-12-19 2009-06-24 E. Schwenk Dämmtechnik GmbH & Co. KG Procédé et dispositif destinés au recyclage de déchets de laine minérale contenant des composants organiques
US20130291591A1 (en) * 2012-05-04 2013-11-07 Sasil S.P.A. Method and equipment for recovering waste from continuous fibre production installations and for directly recycling the resulting glass

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